Insulator-support



B. A. PLIMPTON.

INSULATOR SUPPORT.

APPLICATION men on. 31, I957.

Patented J an. 20, 1920.

[VI TIVIISSES:

R S m a m E R V 0 m J n 1/ A .5 m h V. B 1 l 5 i M3 vvu s 1 I Wm WIIIA BENTLEY A. PLIMPTON, 0F VICTOR, NEW YORK.

'INSULATOB-SUPPORT.

Specification of Letters Patent.

Application filed October 81, 1917. Serial No. 199,579.

To all whom it may concern."

Be it known that I, BENTLEY A. PLIMP- ION, of Victor, in the county of Ontario and State of New York, have invented certain new and useful Improvements in Insulator- Supports; and I do hereby declare the following to be a full, clear, and exact descri tion of the same, reference being had tot e accompanying drawings, forming a part of this specification, and t0 the reference-numerals marked thereon.

My invention relates to insulator supports, and especially to the class known as pm supports involving generally some form of attaching means for securing a pin upon a cross arm, and provision for retainin insulator upon the upper end of the pin in such manner as to allow for ex ansion and contraction without destructive y affecting the insulating material. An equally im ortant purpose of the improvement is to a 0rd an economical arrangement which can be manufactured and assembled with a minimum expense, and which also serves to provide an extremely rigid device capable of withstandin great strains. To these andother ends t e invention consists in certain improvements and combinations of arts, all as will be hereinafter more fully escribed, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure l is a vertical sectional View of an insulator and pin support, with my invention incorporated, and

Fig. 2 is a sectional view ofthe pin.

Similar reference numerals in the several figures indicate the same parts.

The structure shown includes a more or less conventional and well known means of attaching the insulator to a support, consisting of the usual cross arm or similar part 1, upon which is arranged a tapered truss memher 2 of hollow formation, to receive the.

body portion 3 of the pin. The latter passes throu h an opening 4 in the cross arm and is threa ed at its lower end to receive the retaining nut 5.

The novel part of the structure resides in the means for supporting the pin upon the truss member 2 and for securing the insulator in place on the pin. To this end, the

in includes an enlar ed upper end 6 which is formed integral with the body portion 3 and threaded exteriorly. Thethreaded upper end or thimble engaging portion 6 cocheap1 operates with the insulator 7, which is of the usual type, and formed of orcelain or other non-con uctlng material. he insulator carries a thimble 8 which is preferably cemented or otherwise permanently attached to it, and is threaded interiorly to engage the threaded portion 6 on the pin.

9 designates a collar or shoulder ermanently attached to the pin 3, and pre erably formed integral therewith. The collar 9 is arranged beneath the thimble engaging ortion 6, and rests upon the upper end 0 the truss member 2. The collar 9 is provided on its upper side with an inclined surface 10, a ainst which the outer edge 11 of the thimb e 8 abuts, when the insulator is fully threaded on the pin. This makes it possible to obtain a tight connection between the thimble and the pin as the lower end of the thimble is forced tightly against the inclined surface 10, setting up a ammin action between the threads on the thim le and the threads on the pin. The innermost end of the thimble 12 extends slightly beyond the threaded portion, and slightly beyond the inner end 13 of the pin when the latter is fully engaged, affording a space 14 between the parts. This gives suflicient clearance to permit the outer edge of 'the thimble to wedge tightly against the inclined surface 10 of the collar, and to also allow for the necessary expansion and contraction of the pin, without having it injure the porcelain.

By this arrangement, a very simple and construction is afforded, and one whic will withstand very heavy strains without causing an appreciable deflection of the pin, and any expansion of the latter is taken care of, so as not to seriously affect the insulatin member, which at the same time is held rigidly under all conditions.

I claim as my invention:

Patented Jan. 20, 1920.

1. The combination with a threaded insu- 2. The combination with a threaded insulator thimble, of a pin having an integral threaded thimble portion at its upper end, a collar ermanently attached to the pin beneath .t e thimble portion and havin an upperinclined surface against which t e outer end of the thimble en ages, a hollow truss member on which t e collar rests and throu h which the bod portion of the pin.

exten s, a support for t e truss member, and retaining means attached to the pin on the under side of the support. I

3. The combination with a threaded insulator thimble, the innermost end of which extends slightly beyond the threads to afl'ord a space between the end of the thimble and 15 the end of a pin when threaded therein, of a pin having an integral threaded thimble portion at its upper end, a collar inte ally attached to the pin beneath the thimb e portion and having an upper inclined surface against 20 member, and retaining means attached to the 25 pin on the under sideof the support.

BENTLEY A. PLIMPTON. 

